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FIXED ORTHODONTIC APPLIANCES

FIXED ORTHODONTIC APPLIANCES. DENT 657. REMOVABLE Tipping only No control over root movement Pt’s co-operation Hygienic. FIXED Bodily translation Control of root movement Less dependent on pt’s co-op Less hygienic. Removable vs. Fixed Appliances.

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FIXED ORTHODONTIC APPLIANCES

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  1. FIXED ORTHODONTIC APPLIANCES DENT 657

  2. REMOVABLE Tipping only No control over root movement Pt’s co-operation Hygienic FIXED Bodily translation Control of root movement Less dependent on pt’s co-op Less hygienic Removable vs. Fixed Appliances

  3. DEVELOPMENT OF FIXED ORTHODONTIC APPLIANCES

  4. Development of Fixed appliances • Early fixed appliances • Late 1800s • Edward Angle

  5. EARLY FIXED APPLIANCES

  6. Development of Fixed appliances • Standard Edgewise appliance • Early 1900s

  7. Development of Fixed appliances • Pre-adjusted edgewise appliance • 1970s • Refined manufacturing process with “built-in” adjustments specific for each tooth • Advances in material sciences made attachment much smaller

  8. BANDED APPLIANCES

  9. Bonding to Enamel

  10. Bonding Surface - Bracket Base

  11. BONDED APPLIANCES

  12. Lingual Appliance

  13. CERAMIC APPLIANCES

  14. Self Ligating Appliance

  15. PASSIVE FIXED APPLIANCES

  16. Components of the Fixed Appliance • Bands • Molar Tubes • Brackets • Buccal Tubes • Arch Wires • Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances

  17. Posterior attachments • MOLAR TUBES

  18. Components of the Fixed Appliance • Bands • Molar Tubes • Brackets • Arch Wires • Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances

  19. Anterior Attachments • Brackets

  20. Components of the Fixed Appliance • Bands • Molar Tubes • Brackets • Arch Wires • Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances

  21. ARCH WIRES • Maxillary and mandibular • Arch form described as “parabolic shaped” • Size and cross-section of wires vary • Material varies eg. Nickel Titanium alloy (NiTi), Titanium Molybdenum Alloy (TMA), Stainless Steel

  22. Components of the Fixed Appliance • Bands • Molar Tubes • Brackets • Arch Wires • Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances

  23. Elastics

  24. EXTRA ORAL FORCES - HEAD GEAR

  25. Coil Spring Closed or open coil springs

  26. Pre-Adjusted Edgewise Appliance or The Straight Wire Appliance • Larry Andrews - studied normal occlusion and individual tooth positions • Developed prescriptions for individual tooth position • Elements of “ideal” tooth position are built into the appliance • Minimizing active “wire manipulation” - The Straight Wire Concept

  27. Pre-adjusted edgewise appliance • First order / in-out - Horizontal plane • Second order / tip - Mesio-distal angulation • Third order / torque - Labio-lingual angulation 3 - Dimensional control of tooth position

  28. First order or In-out

  29. Pre-adjusted edgewise appliance • First order / in-out - Horizontal plane • Second order / tip - Mesio-distal angulation • Third order / torque - Labio-lingual angulation

  30. 4 Second order or Tip

  31. Pre-adjusted edgewise appliance • First order / in-out - Horizontal plane • Second order / tip - Mesio-distal angulation • Third order / torque - Labio-lingual angulation

  32. 4 Third order or Torque To “Torque” is the least efficient tooth movement using orthodontic appliances

  33. Significance of accurate bracket/band positioning • Precise tooth positioning • Optimal effect of “pre-adjustment” • Occlusion • Esthetics • Stability

  34. POSITIONING BRACKETS - GENERAL INSTRUCTIONS Rhomboidal shape Disto-lingual wing mark Central scribe line (long axis)

  35. 4 Maxillary Central Incisors 4

  36. 3.5 Maxillary Lateral Incisor 3.5

  37. 4.5 Maxillary Cuspids 4.5 mm

  38. Maxillary Bicuspids

  39. Mandibular Incisors

  40. Mandibular Cuspid

  41. Mandibular Bicuspids

  42. Maxillary first molar bands

  43. Mandibular first molar bands

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